vice president joe biden during his visit last week. the u.s. state department has declared itself on the same page as seoul. china which released pictures of military exercises sunday said it would have nothing to do with maritime jurisdiction, adding it would stay in communication with seoul. >> they could set the stage for what nobody wants, an accidental conflict in increasingly contested skies. aljazeera, seoul. >> this is the first time south korea has adjusted its zone since 1951. >> the u.s. continues to mourn the loss of nelson mandela. there are many who fought with him with names most people don't know. we'll tell you about 12 people who worked behind the scenes and are now being recognized. >> congress heading back to work in washington will focus on pressing issues, including a big budget deal. >> there is a new call for safety after last week's deadly train crash. >> in week 14 of the nfl, mccoy had a record-setting day in the snow for the philadelphia eagles. highlights coming up in sports. on america tonight on al jazeera america